• sperm
  • The human sperm head vacuoles and their role in male infertility are still poorly understood. (duhnnae.com)
  • The aim of this study was to identify the clinical and ultrastructural features of human sperm head vacuoles in men included in the in vitro fertilization programme: men with normal normozoospermia and impaired sperm morphology teratozoospermia. (duhnnae.com)
  • The sperm of men with impaired sperm morphology was characterized by a higher proportion of sperm head vacuoles. (duhnnae.com)
  • The sperm head vacuoles were related to impaired semen quality sperm concentration, motility, and morphology but were not influenced by male factors semen volume, height, age, weight, or body mass index. (duhnnae.com)
  • In a subgroup of men, the sperm was fixed and observed by transmission electron microscopy TEM. (duhnnae.com)
  • Over the past half century, there has been an increase in scientific data supporting the decline in male sperm count. (wikipedia.org)